Instrument



Patented May 3, 192'?.

UNITED STATES JOHN RIDDLE, OF LONDON, ENGLAND, ASSIGNOR- MAINTENANCE COMBANY,

TO TELEGRAPH CONSTRUCTION AND LMITED, OF LONDON, ENGLND.

GALVANOMETER .AND LIKE RECORDING INSTRUMENT.

Application filed November 21, 1924, Serial No.

This invention relates to delicute record ing .instruments Such :is nre employed tor recordintgr verifv week signals received troni long' distance cubleev` the instruments being ot' the type comprising` u movingi coil suspended in a. magnetic field :ind capable ot turning on an exis (ueunlly vertical) in either direction, accordingy to the currents: received.

The object of the present invention is 'to provide improved ineens: lor connecting' the coil to :i recorder, such us n Siphon.

l-leretoliore it has been customaryv .in dc' cute recordiingr instruments of thin type to connecttlie coil to the recorder by u pair ol: reine mede of sill( or tbe like. This construction poseessee the disudvnntnire that it is diilicult properlyr to zidjurst the rnith ot the tivo reins. In order to overcou'ie 'this disadvantage, it has been proposed (o connect. the coil to the recorder by u single rein ot Sill; or the like. lilith this; .lutter construction, it is necessary vto provide means, euch :is n springn or to i'nount the recorder on springv nniterinl, by which the return movement is ii'npnrted to the recorder.

f\.ccordiiuv to ine pref-:ent in vontion l conneet tbe coil to the recorder b v :i rod or tube ot .rigid nuiterizil7 euch ne :i glues tube, lor example.

Preferably euch end oi' the rod or tube is provided with u short strip olf flexible material, such ,iliosphor bronze, b v menne oit 'which the rod or tube is coiinected to the coil ind recorder, the Strips being; nulliH cientlv flexible lo ulloiv the necessary turning' nioveinent olt the coil sind recorder.

l)ij-e'lei'el.il v menne ure provided Ylfor vibrzlting; the rod or tube in u lziterul direction viz. in u direction et rigrl'it :ingles to exis. This permits` :i rod or tube o'l' lighter construction to be employed thun would other wine be necessary properly to ellieci" the ie turn movementot' the recorder.

ln the riccouipunving drawing"y which Shows ili:i\"'uinniuticzill;Y one We); ol curryille,l out niv invention ne applied to e. eiplion recorder :applic: ble lor une with u sunnuirine crible, Figure 'l u pien und l `igurc is un elevation oi Figure L :ionic oi' the parte beine' on'iittcd Vtrom the figures for 'the Seite ot clcurnefe.

Ll. l :ire the poles ot u. pern'uineut nnic'net and Q is zi coil to which the cable 751,281, and. in Great Britain August 16, 1924.

neeted und which is delicately7 suspeinled :in 'the ueuul nninncr in the lield of the n net. i3 in u eti-ip oit phosphor bronze to which taistened u carrier 'tor fi Siphon pen 5. one end oi which dips' into :in inl; reser voir G, While the other marke u travelling eti-ip oi: paper i", paesino` over rollers 8 in the usuel nmnner. i

rlie Strip 3 is connected ut one end to the urniuture 9 ot :i buzzer l() olj usuel coin etrnction, While the other end is comiected to u spring' ll by ineens olE `which the urip put under tension.

The coil 2 is connected to the carrier by u tube lf2 having ut its ende :diort strips el plioephor bronze i3. le., Vvfliicli nre suliciently flexible to ullmv the nece n.' tornino movement ot' the coil und the cerrier. .ihe end oit` the Strip l ie provided with un eye which engzugee u pin 'l5 on tbe coil 2, While the ond ot the strip i4; is provided with u book to enable it to engage any (.lesired one ot a` number ot holes lo in the carrier et.

ln operation the, oscillating` movements ot the coil are transmitted to the Siphon pen carrier 4l through the tube l2 und Strips 13, i4. 'lhe strip on which the Siphon pen currier by the is mounted vibrated buzzer S) und 'transmite ite vibrations to tl'ic tube l2.

llllintl cluini is:-

l. In u inicro-gulvunonieter and like recording instrument Suitable for receiving sio'nule ot minute power,y the con'ibinntion oi' ineens lo producing :i magnetic field, u coil innnereed therein nndcupeblc oit turring; about :in axis, a flexible strip. :i recorder mounted on Suid strip, und u tubeo'l glues connecting tbe coil to the recorder.

2. ln u micro-gnlvunoineter und like recording' instrument suitfible :tor receiving' signale oit minute poivei; the conil ineiion ot ineens 'for producing i n J coil ininicreed therein :in-rl capable ol' turning about an exis ,u tlexilile istrip, u recorder mounted on said Strip, und rigid ineens connected by tleible ineens to the coil und to the recorder.

3. ln e, inicro-gelvzinonieter und like rocordingl instrument Suitzible iior receivingI o'lt minute poivei;r the combinution of menne` 'tor producing' u uugrnetic liled7 u coil innnereed therein and cupeble ot turning about an wie, o flexible Strip, a recorder Een mounted on seid strip, und a rigid tube connected b i' flexible ineens to the coil und to tlie rec'irder.

4. In :i mii-ro-gnlif'zuiometer and like recording` instrument suitable for receiving signals ot minute power, the combination o'l menus tor ilirodueing :i magnetic tield, :i coil immersed tlierein und capable of turning about :in zixis, :i ilexible strip7 u recorder mounted on sziid strip, und u tube of glass conneeted by l'lexible means to the coil und to the reiiforder.

In :i micro-gulvunometer und like recoi-dingl instrument. suitable for receiving .signals of minnie power, tbe combiinition oiz menus' 'l'or pri'idurineV u n'uignetic tield, u coil inuuersoil tlierein und cupuble ot turning' about :in axis, u flexible strip, a recorder mounted on #nid strip, u tube ot glass Connecting tlie coil to tbe recorder, und means for \iibrutinfy tlie tube of glass in :i lateral direction.

G. In u 1nicro-guli'anometer und like recording instrument suitable for receii/'ing signuls ot minute power, the combination ot` means lor producing n magnetic field7 u coil immersed tlierein und capable ot Iburning` labout an luis, :i liexible strip, a recorder mounted on said strip, rigid means connected by flexible means to the coil and to the recorder, and means tor vibrating the rigid means in a lateral direction.

7. In a micro-galvu-nometer und like recording instrument suitable for receivingA signals ot' minute power, the combination of means for producing zi magnetic lield, u coil immersed therein und capable of turning about un axis, :L Vflexible strip, a recorder mounted on said strip, a rigid tube connected by flexible means to the coil und to tbe recorder, sind means for Vibrating` the rigid tube in :i lateral direction.

S. In u micro-gzili'unometer und like recording instrument suitable for receiving` signals of minute power, the con'iliinzition ot means for producing` :i magnetic lield, :i coil immersed therein und capable oli turningr about un axis, :i 'flexible strip, u recorder mounted on said strip, zi tube ot glass connected by flexible means co tbe coil :ind lo the recorder, and means for vibrating' tbe tube of glass in u lateral direction.

In testimony that I claim tbe iloregoing is my invention I luli'e signed my lnume this 27th day of October, 192i,

JOHN RIDDLE. 

